diff --git a/htdocs/livraison/class/livraison.class.php b/htdocs/livraison/class/livraison.class.php
index 1e7fdebaa64..dcf95b37ad6 100644
--- a/htdocs/livraison/class/livraison.class.php
+++ b/htdocs/livraison/class/livraison.class.php
@@ -64,7 +64,12 @@ class Livraison extends CommonObject
 	public $ref_customer;
 
 	public $date_delivery;    // Date really received
+
+	/**
+	 * @var integer|string date_creation
+	 */
 	public $date_creation;
+
 	public $date_valid;
 	public $model_pdf;
 
diff --git a/htdocs/reception/class/reception.class.php b/htdocs/reception/class/reception.class.php
index eae8ab9de34..d9ba10113bb 100644
--- a/htdocs/reception/class/reception.class.php
+++ b/htdocs/reception/class/reception.class.php
@@ -80,8 +80,14 @@ class Reception extends CommonObject
 	 * @var int
 	 */
 	public $date_reception;
-    public $date_creation;
-    public $date_valid;
+
+	/**
+	 * @var integer|string date_creation
+	 */
+	public $date_creation;
+
+
+	public $date_valid;
 
     public $meths;
     public $listmeths;			// List of carriers
diff --git a/htdocs/societe/class/societe.class.php b/htdocs/societe/class/societe.class.php
index ca17077a47b..9d2f86e5d77 100644
--- a/htdocs/societe/class/societe.class.php
+++ b/htdocs/societe/class/societe.class.php
@@ -316,11 +316,12 @@ class Societe extends CommonObject
 	 * @var string
 	 */
 	public $user_modification;
+
 	/**
-	 * Date of creation
-	 * @var string
+	 * @var integer|string date_creation
 	 */
 	public $date_creation;
+
 	/**
 	 * User that created the thirdparty
 	 * @var User
diff --git a/htdocs/societe/class/societeaccount.class.php b/htdocs/societe/class/societeaccount.class.php
index bf94c522f68..f93dfd0ea68 100644
--- a/htdocs/societe/class/societeaccount.class.php
+++ b/htdocs/societe/class/societeaccount.class.php
@@ -124,7 +124,13 @@ class SocieteAccount extends CommonObject
 	public $date_last_login;
 	public $date_previous_login;
 	public $note_private;
+
+	/**
+	 * @var integer|string date_creation
+	 */
 	public $date_creation;
+
+
 	public $tms;
 
 	/**